Lighting assembly for use on a vehicle

Abstract

A vehicle lighting system or assembly is shown. A lighting system or assembly comprises a reflector, a light bar for mounting on the reflector, a light pipe adapted to be mounted on the reflector and a bracket for securing to the reflector. The light pipe, the light bar and the reflector comprise locators or locating means for causing the components to become registered in a predetermined position when the components of the system are assembled.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]This invention relates to a lighting assembly, and more particularly to a lighting assembly having improved light bar attachment and optical integration.2. Description of the Related Art[0002]In the field of vehicle lighting, light bars and light pipes are often used in headlamp assemblies to provide one or more lighting functions, such as headlamp lighting functions, turn signal functions, side light and / or daytime running light functions. One difficulty with light bars and light pipe designs of the past is the attachment methods that were used to affix these components to the bezel or housing of the headlamp. For example, it was not uncommon that the light bars had small load-bearing surfaces or flanges formed in the light bar at locations that were far from the center of gravity of the light bar. Normal vibration from the vehicle could sometimes cause fatigue or failure at the point where the flanges or surfaces were fixed...

AI Technical Summary

Benefits of technology

This patent aims to provide a light bar that is uninterrupted and continuous, without the need for small load-bearing surfaces. It also aims to provide a system and method of attachment that causes the light bar to be registered with respect to a light pipe that provides light to the light bar. Additionally, it aims to reduce or eliminate fatigue or failure risks associated with vibration by placing areas where the light bar is affixed to the bezel or housing closer to its center of gravity. Finally, it aims to provide an attachment assembly for a light bar and light pipe that reduces or eliminates the need for fasteners, such as screws, to directly engage the light bar or light pipe.

Problems solved by technology

One difficulty with light bars and light pipe designs of the past is the attachment methods that were used to affix these components to the bezel or housing of the headlamp.

Normal vibration from the vehicle could sometimes cause fatigue or failure at the point where the flanges or surfaces were fixed to the bezel or housing.

The optics and the material from which the light bars were manufactured, such as Polymethyl methacrylate (PMMA) or polycarbonate (PC), also created unique problems.

For example, PMMA light bars could not be held by screws and polycarbonate light bars had a lower optical efficiency.

For those light bars that could be used with conventional fasteners or screws, the attachments were typically far away from the center of gravity (CG) of the light bar which made fatigue and failure risk high during vibration.

Another problem with light bar assemblies of the past is that they were often used with light pipes and it was often difficult to register the light bar with respect to the light pipes and / or register either the light bar or the light pipe with respect to a reflector.

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